# uncompyle6 version 3.2.3
# Python bytecode 3.6 (3379)
# Decompiled from: Python 3.6.8 |Anaconda custom (64-bit)| (default, Feb 21 2019, 18:30:04) [MSC v.1916 64 bit (AMD64)]
# Embedded file name: subprocess.py
"""Subprocesses with accessible I/O streams

This module allows you to spawn processes, connect to their
input/output/error pipes, and obtain their return codes.

For a complete description of this module see the Python documentation.

Main API
========
run(...): Runs a command, waits for it to complete, then returns a
          CompletedProcess instance.
Popen(...): A class for flexibly executing a command in a new process

Constants
---------
DEVNULL: Special value that indicates that os.devnull should be used
PIPE:    Special value that indicates a pipe should be created
STDOUT:  Special value that indicates that stderr should go to stdout


Older API
=========
call(...): Runs a command, waits for it to complete, then returns
    the return code.
check_call(...): Same as call() but raises CalledProcessError()
    if return code is not 0
check_output(...): Same as check_call() but returns the contents of
    stdout instead of a return code
getoutput(...): Runs a command in the shell, waits for it to complete,
    then returns the output
getstatusoutput(...): Runs a command in the shell, waits for it to complete,
    then returns a (exitcode, output) tuple
"""
import sys

_mswindows = sys.platform == "win32"
import io, os, time, signal, builtins, warnings, errno
from time import monotonic as _time


class SubprocessError(Exception):
    pass


class CalledProcessError(SubprocessError):
    """Raised when run() is called with check=True and the process
    returns a non-zero exit status.
    
    Attributes:
      cmd, returncode, stdout, stderr, output
    """

    def __init__(self, returncode, cmd, output=None, stderr=None):
        self.returncode = returncode
        self.cmd = cmd
        self.output = output
        self.stderr = stderr

    def __str__(self):
        if self.returncode:
            if self.returncode < 0:
                try:
                    return "Command '%s' died with %r." % (
                        self.cmd,
                        signal.Signals(-self.returncode),
                    )
                except ValueError:
                    return "Command '%s' died with unknown signal %d." % (
                        self.cmd,
                        -self.returncode,
                    )

            return "Command '%s' returned non-zero exit status %d." % (
                self.cmd,
                self.returncode,
            )

    @property
    def stdout(self):
        """Alias for output attribute, to match stderr"""
        return self.output

    @stdout.setter
    def stdout(self, value):
        self.output = value


class TimeoutExpired(SubprocessError):
    """This exception is raised when the timeout expires while waiting for a
    child process.
    
    Attributes:
        cmd, output, stdout, stderr, timeout
    """

    def __init__(self, cmd, timeout, output=None, stderr=None):
        self.cmd = cmd
        self.timeout = timeout
        self.output = output
        self.stderr = stderr

    def __str__(self):
        return "Command '%s' timed out after %s seconds" % (self.cmd, self.timeout)

    @property
    def stdout(self):
        return self.output

    @stdout.setter
    def stdout(self, value):
        self.output = value


if _mswindows:
    import threading, msvcrt, _winapi

    class STARTUPINFO:
        dwFlags = 0
        hStdInput = None
        hStdOutput = None
        hStdError = None
        wShowWindow = 0


else:
    import _posixsubprocess, select, selectors

    try:
        import threading
    except ImportError:
        import dummy_threading as threading

    _PIPE_BUF = getattr(select, "PIPE_BUF", 512)
    if hasattr(selectors, "PollSelector"):
        _PopenSelector = selectors.PollSelector
    else:
        _PopenSelector = selectors.SelectSelector
    __all__ = [
        "Popen",
        "PIPE",
        "STDOUT",
        "call",
        "check_call",
        "getstatusoutput",
        "getoutput",
        "check_output",
        "run",
        "CalledProcessError",
        "DEVNULL",
        "SubprocessError",
        "TimeoutExpired",
        "CompletedProcess",
    ]
    if _mswindows:
        from _winapi import (
            CREATE_NEW_CONSOLE,
            CREATE_NEW_PROCESS_GROUP,
            STD_INPUT_HANDLE,
            STD_OUTPUT_HANDLE,
            STD_ERROR_HANDLE,
            SW_HIDE,
            STARTF_USESTDHANDLES,
            STARTF_USESHOWWINDOW,
        )

        __all__.extend(
            [
                "CREATE_NEW_CONSOLE",
                "CREATE_NEW_PROCESS_GROUP",
                "STD_INPUT_HANDLE",
                "STD_OUTPUT_HANDLE",
                "STD_ERROR_HANDLE",
                "SW_HIDE",
                "STARTF_USESTDHANDLES",
                "STARTF_USESHOWWINDOW",
                "STARTUPINFO",
            ]
        )

        class Handle(int):
            closed = False

            def Close(self, CloseHandle=_winapi.CloseHandle):
                if not self.closed:
                    self.closed = True
                    CloseHandle(self)

            def Detach(self):
                if not self.closed:
                    self.closed = True
                    return int(self)
                raise ValueError("already closed")

            def __repr__(self):
                return "%s(%d)" % (self.__class__.__name__, int(self))

            __del__ = Close
            __str__ = __repr__

    _active = []

    def _cleanup():
        for inst in _active[:]:
            res = inst._internal_poll(_deadstate=sys.maxsize)
            if res is not None:
                try:
                    _active.remove(inst)
                except ValueError:
                    pass

    PIPE = -1
    STDOUT = -2
    DEVNULL = -3

    def _optim_args_from_interpreter_flags():
        """Return a list of command-line arguments reproducing the current
        optimization settings in sys.flags."""
        args = []
        value = sys.flags.optimize
        if value > 0:
            args.append("-" + "O" * value)
        return args

    def _args_from_interpreter_flags():
        """Return a list of command-line arguments reproducing the current
        settings in sys.flags and sys.warnoptions."""
        flag_opt_map = {
            "debug": "d",
            "dont_write_bytecode": "B",
            "no_user_site": "s",
            "no_site": "S",
            "ignore_environment": "E",
            "verbose": "v",
            "bytes_warning": "b",
            "quiet": "q",
        }
        args = _optim_args_from_interpreter_flags()
        for flag, opt in flag_opt_map.items():
            v = getattr(sys.flags, flag)
            if v > 0:
                args.append("-" + opt * v)

        for opt in sys.warnoptions:
            args.append("-W" + opt)

        return args

    def call(*popenargs, timeout=None ** kwargs):
        """Run command with arguments.  Wait for command to complete or
        timeout, then return the returncode attribute.
        
        The arguments are the same as for the Popen constructor.  Example:
        
        retcode = call(["ls", "-l"])
        """
        with Popen(*popenargs, **kwargs) as (p):
            try:
                return p.wait(timeout=timeout)
            except:
                p.kill()
                p.wait()
                raise

    def check_call(*popenargs, **kwargs):
        """Run command with arguments.  Wait for command to complete.  If
        the exit code was zero then return, otherwise raise
        CalledProcessError.  The CalledProcessError object will have the
        return code in the returncode attribute.
        
        The arguments are the same as for the call function.  Example:
        
        check_call(["ls", "-l"])
        """
        retcode = call(*popenargs, **kwargs)
        if retcode:
            cmd = kwargs.get("args")
            if cmd is None:
                cmd = popenargs[0]
            raise CalledProcessError(retcode, cmd)
        return 0

    def check_output(*popenargs, timeout=None ** kwargs):
        r"""Run command with arguments and return its output.
        
        If the exit code was non-zero it raises a CalledProcessError.  The
        CalledProcessError object will have the return code in the returncode
        attribute and output in the output attribute.
        
        The arguments are the same as for the Popen constructor.  Example:
        
        >>> check_output(["ls", "-l", "/dev/null"])
        b'crw-rw-rw- 1 root root 1, 3 Oct 18  2007 /dev/null\n'
        
        The stdout argument is not allowed as it is used internally.
        To capture standard error in the result, use stderr=STDOUT.
        
        >>> check_output(["/bin/sh", "-c",
        ...               "ls -l non_existent_file ; exit 0"],
        ...              stderr=STDOUT)
        b'ls: non_existent_file: No such file or directory\n'
        
        There is an additional optional argument, "input", allowing you to
        pass a string to the subprocess's stdin.  If you use this argument
        you may not also use the Popen constructor's "stdin" argument, as
        it too will be used internally.  Example:
        
        >>> check_output(["sed", "-e", "s/foo/bar/"],
        ...              input=b"when in the course of fooman events\n")
        b'when in the course of barman events\n'
        
        If universal_newlines=True is passed, the "input" argument must be a
        string and the return value will be a string rather than bytes.
        """
        if "stdout" in kwargs:
            raise ValueError("stdout argument not allowed, it will be overridden.")
        if "input" in kwargs:
            if kwargs["input"] is None:
                kwargs["input"] = "" if kwargs.get("universal_newlines", False) else b""
        return (run(stdout=PIPE, timeout=timeout, check=True, **kwargs)).stdout

    class CompletedProcess(object):
        """A process that has finished running.
        
        This is returned by run().
        
        Attributes:
          args: The list or str args passed to run().
          returncode: The exit code of the process, negative for signals.
          stdout: The standard output (None if not captured).
          stderr: The standard error (None if not captured).
        """

        def __init__(self, args, returncode, stdout=None, stderr=None):
            self.args = args
            self.returncode = returncode
            self.stdout = stdout
            self.stderr = stderr

        def __repr__(self):
            args = [
                ("args={!r}").format(self.args),
                ("returncode={!r}").format(self.returncode),
            ]
            if self.stdout is not None:
                args.append(("stdout={!r}").format(self.stdout))
            if self.stderr is not None:
                args.append(("stderr={!r}").format(self.stderr))
            return ("{}({})").format(type(self).__name__, (", ").join(args))

        def check_returncode(self):
            """Raise CalledProcessError if the exit code is non-zero."""
            if self.returncode:
                raise CalledProcessError(
                    self.returncode, self.args, self.stdout, self.stderr
                )

    def run(*popenargs, input=None, timeout=None, check=False ** kwargs):
        """Run command with arguments and return a CompletedProcess instance.
        
        The returned instance will have attributes args, returncode, stdout and
        stderr. By default, stdout and stderr are not captured, and those attributes
        will be None. Pass stdout=PIPE and/or stderr=PIPE in order to capture them.
        
        If check is True and the exit code was non-zero, it raises a
        CalledProcessError. The CalledProcessError object will have the return code
        in the returncode attribute, and output & stderr attributes if those streams
        were captured.
        
        If timeout is given, and the process takes too long, a TimeoutExpired
        exception will be raised.
        
        There is an optional argument "input", allowing you to
        pass a string to the subprocess's stdin.  If you use this argument
        you may not also use the Popen constructor's "stdin" argument, as
        it will be used internally.
        
        The other arguments are the same as for the Popen constructor.
        
        If universal_newlines=True is passed, the "input" argument must be a
        string and stdout/stderr in the returned object will be strings rather than
        bytes.
        """
        if input is not None:
            if "stdin" in kwargs:
                raise ValueError("stdin and input arguments may not both be used.")
            kwargs["stdin"] = PIPE
        with Popen(*popenargs, **kwargs) as (process):
            try:
                stdout, stderr = process.communicate(input, timeout=timeout)
            except TimeoutExpired:
                process.kill()
                stdout, stderr = process.communicate()
                raise TimeoutExpired(
                    process.args, timeout, output=stdout, stderr=stderr
                )
            except:
                process.kill()
                process.wait()
                raise

            retcode = process.poll()
            if check:
                if retcode:
                    raise CalledProcessError(
                        retcode, process.args, output=stdout, stderr=stderr
                    )
        return CompletedProcess(process.args, retcode, stdout, stderr)

    def list2cmdline(seq):
        """
        Translate a sequence of arguments into a command line
        string, using the same rules as the MS C runtime:
        
        1) Arguments are delimited by white space, which is either a
           space or a tab.
        
        2) A string surrounded by double quotation marks is
           interpreted as a single argument, regardless of white space
           contained within.  A quoted string can be embedded in an
           argument.
        
        3) A double quotation mark preceded by a backslash is
           interpreted as a literal double quotation mark.
        
        4) Backslashes are interpreted literally, unless they
           immediately precede a double quotation mark.
        
        5) If backslashes immediately precede a double quotation mark,
           every pair of backslashes is interpreted as a literal
           backslash.  If the number of backslashes is odd, the last
           backslash escapes the next double quotation mark as
           described in rule 3.
        """
        result = []
        needquote = False
        for arg in seq:
            bs_buf = []
            if result:
                result.append(" ")
            needquote = " " in arg or "\t" in arg or not arg
            if needquote:
                result.append('"')
            for c in arg:
                if c == "\\":
                    bs_buf.append(c)
                elif c == '"':
                    result.append("\\" * len(bs_buf) * 2)
                    bs_buf = []
                    result.append('\\"')
                else:
                    if bs_buf:
                        result.extend(bs_buf)
                        bs_buf = []
                    result.append(c)

            if bs_buf:
                result.extend(bs_buf)
            if needquote:
                result.extend(bs_buf)
                result.append('"')

        return ("").join(result)

    def getstatusoutput(cmd):
        """Return (exitcode, output) of executing cmd in a shell.
        
        Execute the string 'cmd' in a shell with 'check_output' and
        return a 2-tuple (status, output). The locale encoding is used
        to decode the output and process newlines.
        
        A trailing newline is stripped from the output.
        The exit status for the command can be interpreted
        according to the rules for the function 'wait'. Example:
        
        >>> import subprocess
        >>> subprocess.getstatusoutput('ls /bin/ls')
        (0, '/bin/ls')
        >>> subprocess.getstatusoutput('cat /bin/junk')
        (1, 'cat: /bin/junk: No such file or directory')
        >>> subprocess.getstatusoutput('/bin/junk')
        (127, 'sh: /bin/junk: not found')
        >>> subprocess.getstatusoutput('/bin/kill $$')
        (-15, '')
        """
        try:
            data = check_output(cmd, shell=True, universal_newlines=True, stderr=STDOUT)
            exitcode = 0
        except CalledProcessError as ex:
            data = ex.output
            exitcode = ex.returncode

        if data[-1:] == "\n":
            data = data[:-1]
        return (exitcode, data)

    def getoutput(cmd):
        """Return output (stdout or stderr) of executing cmd in a shell.
        
        Like getstatusoutput(), except the exit status is ignored and the return
        value is a string containing the command's output.  Example:
        
        >>> import subprocess
        >>> subprocess.getoutput('ls /bin/ls')
        '/bin/ls'
        """
        return getstatusoutput(cmd)[1]

    _PLATFORM_DEFAULT_CLOSE_FDS = object()

    class Popen(object):
        """ Execute a child program in a new process.
        
        For a complete description of the arguments see the Python documentation.
        
        Arguments:
          args: A string, or a sequence of program arguments.
        
          bufsize: supplied as the buffering argument to the open() function when
              creating the stdin/stdout/stderr pipe file objects
        
          executable: A replacement program to execute.
        
          stdin, stdout and stderr: These specify the executed programs' standard
              input, standard output and standard error file handles, respectively.
        
          preexec_fn: (POSIX only) An object to be called in the child process
              just before the child is executed.
        
          close_fds: Controls closing or inheriting of file descriptors.
        
          shell: If true, the command will be executed through the shell.
        
          cwd: Sets the current directory before the child is executed.
        
          env: Defines the environment variables for the new process.
        
          universal_newlines: If true, use universal line endings for file
              objects stdin, stdout and stderr.
        
          startupinfo and creationflags (Windows only)
        
          restore_signals (POSIX only)
        
          start_new_session (POSIX only)
        
          pass_fds (POSIX only)
        
          encoding and errors: Text mode encoding and error handling to use for
              file objects stdin, stdout and stderr.
        
        Attributes:
            stdin, stdout, stderr, pid, returncode
        """

        _child_created = False

        def __init__(
            self,
            args,
            bufsize=-1,
            executable=None,
            stdin=None,
            stdout=None,
            stderr=None,
            preexec_fn=None,
            close_fds=_PLATFORM_DEFAULT_CLOSE_FDS,
            shell=False,
            cwd=None,
            env=None,
            universal_newlines=False,
            startupinfo=None,
            creationflags=0,
            restore_signals=True,
            start_new_session=False,
            pass_fds=(),
            *,
            encoding=None,
            errors=None
        ):
            """Create new Popen instance."""
            _cleanup()
            self._waitpid_lock = threading.Lock()
            self._input = None
            self._communication_started = False
            if bufsize is None:
                bufsize = -1
            if not isinstance(bufsize, int):
                raise TypeError("bufsize must be an integer")
            if _mswindows:
                if preexec_fn is not None:
                    raise ValueError("preexec_fn is not supported on Windows platforms")
                any_stdio_set = (
                    stdin is not None or stdout is not None or stderr is not None
                )
                if close_fds is _PLATFORM_DEFAULT_CLOSE_FDS:
                    if any_stdio_set:
                        close_fds = False
                    else:
                        close_fds = True
                else:
                    if close_fds:
                        if any_stdio_set:
                            raise ValueError(
                                "close_fds is not supported on Windows platforms if you redirect stdin/stdout/stderr"
                            )
                        else:
                            if close_fds is _PLATFORM_DEFAULT_CLOSE_FDS:
                                close_fds = True
                            if pass_fds:
                                if not close_fds:
                                    warnings.warn(
                                        "pass_fds overriding close_fds.", RuntimeWarning
                                    )
                                    close_fds = True
                            if startupinfo is not None:
                                raise ValueError(
                                    "startupinfo is only supported on Windows platforms"
                                )
                            if creationflags != 0:
                                raise ValueError(
                                    "creationflags is only supported on Windows platforms"
                                )
                        self.args = args
                        self.stdin = None
                        self.stdout = None
                        self.stderr = None
                        self.pid = None
                        self.returncode = None
                        self.universal_newlines = universal_newlines
                        self.encoding = encoding
                        self.errors = errors
                        p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite = self._get_handles(
                            stdin, stdout, stderr
                        )
                        if _mswindows:
                            if p2cwrite != -1:
                                p2cwrite = msvcrt.open_osfhandle(p2cwrite.Detach(), 0)
                            if c2pread != -1:
                                c2pread = msvcrt.open_osfhandle(c2pread.Detach(), 0)
                            if errread != -1:
                                errread = msvcrt.open_osfhandle(errread.Detach(), 0)
                        text_mode = encoding or errors or universal_newlines
                        self._closed_child_pipe_fds = False
            try:
                if p2cwrite != -1:
                    self.stdin = io.open(p2cwrite, "wb", bufsize)
                    if text_mode:
                        self.stdin = io.TextIOWrapper(
                            self.stdin,
                            write_through=True,
                            line_buffering=bufsize == 1,
                            encoding=encoding,
                            errors=errors,
                        )
                if c2pread != -1:
                    self.stdout = io.open(c2pread, "rb", bufsize)
                    if text_mode:
                        self.stdout = io.TextIOWrapper(
                            self.stdout, encoding=encoding, errors=errors
                        )
                if errread != -1:
                    self.stderr = io.open(errread, "rb", bufsize)
                    if text_mode:
                        self.stderr = io.TextIOWrapper(
                            self.stderr, encoding=encoding, errors=errors
                        )
                self._execute_child(
                    args,
                    executable,
                    preexec_fn,
                    close_fds,
                    pass_fds,
                    cwd,
                    env,
                    startupinfo,
                    creationflags,
                    shell,
                    p2cread,
                    p2cwrite,
                    c2pread,
                    c2pwrite,
                    errread,
                    errwrite,
                    restore_signals,
                    start_new_session,
                )
            except:
                for f in filter(None, (self.stdin, self.stdout, self.stderr)):
                    try:
                        f.close()
                    except OSError:
                        pass

                if not self._closed_child_pipe_fds:
                    to_close = []
                    if stdin == PIPE:
                        to_close.append(p2cread)
                    if stdout == PIPE:
                        to_close.append(c2pwrite)
                    if stderr == PIPE:
                        to_close.append(errwrite)
                    if hasattr(self, "_devnull"):
                        to_close.append(self._devnull)
                    for fd in to_close:
                        try:
                            if _mswindows:
                                if isinstance(fd, Handle):
                                    fd.Close()
                                os.close(fd)
                        except OSError:
                            pass

                raise

        def _translate_newlines(self, data, encoding, errors):
            data = data.decode(encoding, errors)
            return data.replace("\r\n", "\n").replace("\r", "\n")

        def __enter__(self):
            return self

        def __exit__(self, type, value, traceback):
            if self.stdout:
                self.stdout.close()
            if self.stderr:
                self.stderr.close()
            try:
                if self.stdin:
                    self.stdin.close()
            finally:
                self.wait()

        def __del__(self, _maxsize=sys.maxsize, _warn=warnings.warn):
            if not self._child_created:
                return
            if self.returncode is None:
                _warn(
                    "subprocess %s is still running" % self.pid,
                    ResourceWarning,
                    source=self,
                )
            self._internal_poll(_deadstate=_maxsize)
            if self.returncode is None:
                if _active is not None:
                    _active.append(self)

        def _get_devnull(self):
            if not hasattr(self, "_devnull"):
                self._devnull = os.open(os.devnull, os.O_RDWR)
            return self._devnull

        def _stdin_write(self, input):
            if input:
                pass
            try:
                self.stdin.write(input)
            except BrokenPipeError:
                pass
            except OSError as exc:
                if exc.errno == errno.EINVAL:
                    pass
                else:
                    raise

            try:
                self.stdin.close()
            except BrokenPipeError:
                pass
            except OSError as exc:
                if exc.errno == errno.EINVAL:
                    pass
                else:
                    raise

        def communicate(self, input=None, timeout=None):
            """Interact with process: Send data to stdin.  Read data from
            stdout and stderr, until end-of-file is reached.  Wait for
            process to terminate.
            
            The optional "input" argument should be data to be sent to the
            child process (if self.universal_newlines is True, this should
            be a string; if it is False, "input" should be bytes), or
            None, if no data should be sent to the child.
            
            communicate() returns a tuple (stdout, stderr).  These will be
            bytes or, if self.universal_newlines was True, a string.
            """
            if self._communication_started:
                if input:
                    raise ValueError("Cannot send input after starting communication")
            if timeout is None:
                if not self._communication_started:
                    if [self.stdin, self.stdout, self.stderr].count(None) >= 2:
                        stdout = None
                        stderr = None
                        if self.stdin:
                            self._stdin_write(input)
                        else:
                            if self.stdout:
                                stdout = self.stdout.read()
                                self.stdout.close()
                            else:
                                if self.stderr:
                                    stderr = self.stderr.read()
                                    self.stderr.close()
                            self.wait()
                    if timeout is not None:
                        endtime = _time() + timeout
                    else:
                        endtime = None
                    try:
                        stdout, stderr = self._communicate(input, endtime, timeout)
                    finally:
                        self._communication_started = True

                    sts = self.wait(timeout=self._remaining_time(endtime))
                return (stdout, stderr)

        def poll(self):
            """Check if child process has terminated. Set and return returncode
            attribute."""
            return self._internal_poll()

        def _remaining_time(self, endtime):
            """Convenience for _communicate when computing timeouts."""
            if endtime is None:
                return
            else:
                return endtime - _time()

        def _check_timeout(self, endtime, orig_timeout):
            """Convenience for checking if a timeout has expired."""
            if endtime is None:
                return
            if _time() > endtime:
                raise TimeoutExpired(self.args, orig_timeout)

        if _mswindows:

            def _get_handles(self, stdin, stdout, stderr):
                """Construct and return tuple with IO objects:
                p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
                """
                if stdin is None and stdout is None:
                    if stderr is None:
                        return (-1, -1, -1, -1, -1, -1)
                    p2cread, p2cwrite = (-1, -1)
                    c2pread, c2pwrite = (-1, -1)
                    errread, errwrite = (-1, -1)
                    if stdin is None:
                        p2cread = _winapi.GetStdHandle(_winapi.STD_INPUT_HANDLE)
                        if p2cread is None:
                            p2cread, _ = _winapi.CreatePipe(None, 0)
                            p2cread = Handle(p2cread)
                            _winapi.CloseHandle(_)
                    else:
                        if stdin == PIPE:
                            p2cread, p2cwrite = _winapi.CreatePipe(None, 0)
                            p2cread, p2cwrite = Handle(p2cread), Handle(p2cwrite)
                        else:
                            if stdin == DEVNULL:
                                p2cread = msvcrt.get_osfhandle(self._get_devnull())
                            else:
                                if isinstance(stdin, int):
                                    p2cread = msvcrt.get_osfhandle(stdin)
                                else:
                                    p2cread = msvcrt.get_osfhandle(stdin.fileno())
                    p2cread = self._make_inheritable(p2cread)
                    if stdout is None:
                        c2pwrite = _winapi.GetStdHandle(_winapi.STD_OUTPUT_HANDLE)
                        if c2pwrite is None:
                            _, c2pwrite = _winapi.CreatePipe(None, 0)
                            c2pwrite = Handle(c2pwrite)
                            _winapi.CloseHandle(_)
                        else:
                            if stdout == PIPE:
                                c2pread, c2pwrite = _winapi.CreatePipe(None, 0)
                                c2pread, c2pwrite = Handle(c2pread), Handle(c2pwrite)
                            else:
                                if stdout == DEVNULL:
                                    c2pwrite = msvcrt.get_osfhandle(self._get_devnull())
                                else:
                                    if isinstance(stdout, int):
                                        c2pwrite = msvcrt.get_osfhandle(stdout)
                                    else:
                                        c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
                    c2pwrite = self._make_inheritable(c2pwrite)
                    if stderr is None:
                        errwrite = _winapi.GetStdHandle(_winapi.STD_ERROR_HANDLE)
                        if errwrite is None:
                            _, errwrite = _winapi.CreatePipe(None, 0)
                            errwrite = Handle(errwrite)
                            _winapi.CloseHandle(_)
                        else:
                            if stderr == PIPE:
                                errread, errwrite = _winapi.CreatePipe(None, 0)
                                errread, errwrite = Handle(errread), Handle(errwrite)
                            else:
                                if stderr == STDOUT:
                                    errwrite = c2pwrite
                                else:
                                    if stderr == DEVNULL:
                                        errwrite = msvcrt.get_osfhandle(
                                            self._get_devnull()
                                        )
                                    else:
                                        if isinstance(stderr, int):
                                            errwrite = msvcrt.get_osfhandle(stderr)
                                        else:
                                            errwrite = msvcrt.get_osfhandle(
                                                stderr.fileno()
                                            )
                                        errwrite = self._make_inheritable(errwrite)
                                        return (
                                            p2cread,
                                            p2cwrite,
                                            c2pread,
                                            c2pwrite,
                                            errread,
                                            errwrite,
                                        )

            def _make_inheritable(self, handle):
                """Return a duplicate of handle, which is inheritable"""
                h = _winapi.DuplicateHandle(
                    _winapi.GetCurrentProcess(),
                    handle,
                    _winapi.GetCurrentProcess(),
                    0,
                    1,
                    _winapi.DUPLICATE_SAME_ACCESS,
                )
                return Handle(h)

            def _execute_child(
                self,
                args,
                executable,
                preexec_fn,
                close_fds,
                pass_fds,
                cwd,
                env,
                startupinfo,
                creationflags,
                shell,
                p2cread,
                p2cwrite,
                c2pread,
                c2pwrite,
                errread,
                errwrite,
                unused_restore_signals,
                unused_start_new_session,
            ):
                """Execute program (MS Windows version)"""
                if not not pass_fds:
                    raise AssertionError("pass_fds not supported on Windows.")
                if not isinstance(args, str):
                    args = list2cmdline(args)
                if startupinfo is None:
                    startupinfo = STARTUPINFO()
                if -1 not in (p2cread, c2pwrite, errwrite):
                    startupinfo.dwFlags |= _winapi.STARTF_USESTDHANDLES
                    startupinfo.hStdInput = p2cread
                    startupinfo.hStdOutput = c2pwrite
                    startupinfo.hStdError = errwrite
                if shell:
                    startupinfo.dwFlags |= _winapi.STARTF_USESHOWWINDOW
                    startupinfo.wShowWindow = _winapi.SW_HIDE
                    comspec = os.environ.get("COMSPEC", "cmd.exe")
                    args = ('{} /c "{}"').format(comspec, args)
                try:
                    hp, ht, pid, tid = _winapi.CreateProcess(
                        executable,
                        args,
                        None,
                        None,
                        int(not close_fds),
                        creationflags,
                        env,
                        os.fspath(cwd) if cwd is not None else None,
                        startupinfo,
                    )
                finally:
                    if p2cread != -1:
                        p2cread.Close()
                    if c2pwrite != -1:
                        c2pwrite.Close()
                    if errwrite != -1:
                        errwrite.Close()
                    if hasattr(self, "_devnull"):
                        os.close(self._devnull)
                    self._closed_child_pipe_fds = True

                self._child_created = True
                self._handle = Handle(hp)
                self.pid = pid
                _winapi.CloseHandle(ht)

            def _internal_poll(
                self,
                _deadstate=None,
                _WaitForSingleObject=_winapi.WaitForSingleObject,
                _WAIT_OBJECT_0=_winapi.WAIT_OBJECT_0,
                _GetExitCodeProcess=_winapi.GetExitCodeProcess,
            ):
                """Check if child process has terminated.  Returns returncode
                attribute.
                
                This method is called by __del__, so it can only refer to objects
                in its local scope.
                
                """
                if self.returncode is None:
                    if _WaitForSingleObject(self._handle, 0) == _WAIT_OBJECT_0:
                        self.returncode = _GetExitCodeProcess(self._handle)
                return self.returncode

            def wait(self, timeout=None, endtime=None):
                """Wait for child process to terminate.  Returns returncode
                attribute."""
                if endtime is not None:
                    warnings.warn(
                        "'endtime' argument is deprecated; use 'timeout'.",
                        DeprecationWarning,
                        stacklevel=2,
                    )
                    timeout = self._remaining_time(endtime)
                if timeout is None:
                    timeout_millis = _winapi.INFINITE
                else:
                    timeout_millis = int(timeout * 1000)
                if self.returncode is None:
                    result = _winapi.WaitForSingleObject(self._handle, timeout_millis)
                    if result == _winapi.WAIT_TIMEOUT:
                        raise TimeoutExpired(self.args, timeout)
                    self.returncode = _winapi.GetExitCodeProcess(self._handle)
                return self.returncode

            def _readerthread(self, fh, buffer):
                buffer.append(fh.read())
                fh.close()

            def _communicate(self, input, endtime, orig_timeout):
                if self.stdout:
                    if not hasattr(self, "_stdout_buff"):
                        self._stdout_buff = []
                        self.stdout_thread = threading.Thread(
                            target=self._readerthread,
                            args=(self.stdout, self._stdout_buff),
                        )
                        self.stdout_thread.daemon = True
                        self.stdout_thread.start()
                if self.stderr:
                    if not hasattr(self, "_stderr_buff"):
                        self._stderr_buff = []
                        self.stderr_thread = threading.Thread(
                            target=self._readerthread,
                            args=(self.stderr, self._stderr_buff),
                        )
                        self.stderr_thread.daemon = True
                        self.stderr_thread.start()
                if self.stdin:
                    self._stdin_write(input)
                if self.stdout is not None:
                    self.stdout_thread.join(self._remaining_time(endtime))
                    if self.stdout_thread.is_alive():
                        raise TimeoutExpired(self.args, orig_timeout)
                if self.stderr is not None:
                    self.stderr_thread.join(self._remaining_time(endtime))
                    if self.stderr_thread.is_alive():
                        raise TimeoutExpired(self.args, orig_timeout)
                stdout = None
                stderr = None
                if self.stdout:
                    stdout = self._stdout_buff
                    self.stdout.close()
                if self.stderr:
                    stderr = self._stderr_buff
                    self.stderr.close()
                if stdout is not None:
                    stdout = stdout[0]
                if stderr is not None:
                    stderr = stderr[0]
                return (stdout, stderr)

            def send_signal(self, sig):
                """Send a signal to the process."""
                if self.returncode is not None:
                    return
                if sig == signal.SIGTERM:
                    self.terminate()
                else:
                    if sig == signal.CTRL_C_EVENT:
                        os.kill(self.pid, signal.CTRL_C_EVENT)
                    else:
                        if sig == signal.CTRL_BREAK_EVENT:
                            os.kill(self.pid, signal.CTRL_BREAK_EVENT)
                        else:
                            raise ValueError(("Unsupported signal: {}").format(sig))

            def terminate(self):
                """Terminates the process."""
                if self.returncode is not None:
                    return
                try:
                    _winapi.TerminateProcess(self._handle, 1)
                except PermissionError:
                    rc = _winapi.GetExitCodeProcess(self._handle)
                    if rc == _winapi.STILL_ACTIVE:
                        raise
                    self.returncode = rc

            kill = terminate
        else:

            def _get_handles(self, stdin, stdout, stderr):
                """Construct and return tuple with IO objects:
                p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
                """
                p2cread, p2cwrite = (-1, -1)
                c2pread, c2pwrite = (-1, -1)
                errread, errwrite = (-1, -1)
                if stdin is None:
                    pass
                else:
                    if stdin == PIPE:
                        p2cread, p2cwrite = os.pipe()
                    else:
                        if stdin == DEVNULL:
                            p2cread = self._get_devnull()
                        else:
                            if isinstance(stdin, int):
                                p2cread = stdin
                            else:
                                p2cread = stdin.fileno()
                            if stdout is None:
                                pass
                            else:
                                if stdout == PIPE:
                                    c2pread, c2pwrite = os.pipe()
                                else:
                                    if stdout == DEVNULL:
                                        c2pwrite = self._get_devnull()
                                    else:
                                        if isinstance(stdout, int):
                                            c2pwrite = stdout
                                        else:
                                            c2pwrite = stdout.fileno()
                                        if stderr is None:
                                            pass
                                        else:
                                            if stderr == PIPE:
                                                errread, errwrite = os.pipe()
                                            else:
                                                if stderr == STDOUT:
                                                    if c2pwrite != -1:
                                                        errwrite = c2pwrite
                                                    else:
                                                        errwrite = (
                                                            sys.__stdout__.fileno()
                                                        )
                                                else:
                                                    if stderr == DEVNULL:
                                                        errwrite = self._get_devnull()
                                                    else:
                                                        if isinstance(stderr, int):
                                                            errwrite = stderr
                                                        else:
                                                            errwrite = stderr.fileno()
                                                        return (
                                                            p2cread,
                                                            p2cwrite,
                                                            c2pread,
                                                            c2pwrite,
                                                            errread,
                                                            errwrite,
                                                        )

            def _execute_child(
                self,
                args,
                executable,
                preexec_fn,
                close_fds,
                pass_fds,
                cwd,
                env,
                startupinfo,
                creationflags,
                shell,
                p2cread,
                p2cwrite,
                c2pread,
                c2pwrite,
                errread,
                errwrite,
                restore_signals,
                start_new_session,
            ):
                """Execute program (POSIX version)"""
                if isinstance(args, (str, bytes)):
                    args = [args]
                else:
                    args = list(args)
                if shell:
                    args = ["/bin/sh", "-c"] + args
                    if executable:
                        args[0] = executable
                if executable is None:
                    executable = args[0]
                orig_executable = executable
                errpipe_read, errpipe_write = os.pipe()
                low_fds_to_close = []
                while errpipe_write < 3:
                    low_fds_to_close.append(errpipe_write)
                    errpipe_write = os.dup(errpipe_write)

                for low_fd in low_fds_to_close:
                    os.close(low_fd)

                try:
                    try:
                        if env is not None:
                            env_list = []
                            for k, v in env.items():
                                k = os.fsencode(k)
                                if b"=" in k:
                                    raise ValueError(
                                        "illegal environment variable name"
                                    )
                                env_list.append(k + b"=" + os.fsencode(v))

                        else:
                            env_list = None
                        executable = os.fsencode(executable)
                        if os.path.dirname(executable):
                            executable_list = (executable,)
                        else:
                            executable_list = tuple(
                                (
                                    os.path.join(os.fsencode(dir), executable)
                                    for dir in os.get_exec_path(env)
                                )
                            )
                        fds_to_keep = set(pass_fds)
                        fds_to_keep.add(errpipe_write)
                        self.pid = _posixsubprocess.fork_exec(
                            args,
                            executable_list,
                            close_fds,
                            tuple(sorted(map(int, fds_to_keep))),
                            cwd,
                            env_list,
                            p2cread,
                            p2cwrite,
                            c2pread,
                            c2pwrite,
                            errread,
                            errwrite,
                            errpipe_read,
                            errpipe_write,
                            restore_signals,
                            start_new_session,
                            preexec_fn,
                        )
                        self._child_created = True
                    finally:
                        os.close(errpipe_write)

                    devnull_fd = getattr(self, "_devnull", None)
                    if p2cread != -1:
                        if p2cwrite != -1:
                            if p2cread != devnull_fd:
                                os.close(p2cread)
                    if c2pwrite != -1:
                        if c2pread != -1:
                            if c2pwrite != devnull_fd:
                                os.close(c2pwrite)
                    if errwrite != -1:
                        if errread != -1:
                            if errwrite != devnull_fd:
                                os.close(errwrite)
                    if devnull_fd is not None:
                        os.close(devnull_fd)
                    self._closed_child_pipe_fds = True
                    errpipe_data = bytearray()
                    while 1:
                        part = os.read(errpipe_read, 50000)
                        errpipe_data += part
                        if not part or len(errpipe_data) > 50000:
                            break

                finally:
                    os.close(errpipe_read)

                if errpipe_data:
                    try:
                        pid, sts = os.waitpid(self.pid, 0)
                        if pid == self.pid:
                            self._handle_exitstatus(sts)
                        else:
                            self.returncode = sys.maxsize
                    except ChildProcessError:
                        pass

                    try:
                        exception_name, hex_errno, err_msg = errpipe_data.split(b":", 2)
                        err_msg = err_msg.decode()
                    except ValueError:
                        exception_name = b"SubprocessError"
                        hex_errno = b"0"
                        err_msg = ("Bad exception data from child: {!r}").format(
                            bytes(errpipe_data)
                        )

                    child_exception_type = getattr(
                        builtins, exception_name.decode("ascii"), SubprocessError
                    )
                    if issubclass(child_exception_type, OSError):
                        if hex_errno:
                            errno_num = int(hex_errno, 16)
                            child_exec_never_called = err_msg == "noexec"
                            if child_exec_never_called:
                                err_msg = ""
                                err_filename = cwd
                            else:
                                err_filename = orig_executable
                            if errno_num != 0:
                                err_msg = os.strerror(errno_num)
                                if errno_num == errno.ENOENT:
                                    err_msg += ": " + repr(err_filename)
                            raise child_exception_type(errno_num, err_msg, err_filename)
                    raise child_exception_type(err_msg)

            def _handle_exitstatus(
                self,
                sts,
                _WIFSIGNALED=os.WIFSIGNALED,
                _WTERMSIG=os.WTERMSIG,
                _WIFEXITED=os.WIFEXITED,
                _WEXITSTATUS=os.WEXITSTATUS,
                _WIFSTOPPED=os.WIFSTOPPED,
                _WSTOPSIG=os.WSTOPSIG,
            ):
                """All callers to this function MUST hold self._waitpid_lock."""
                if _WIFSIGNALED(sts):
                    self.returncode = -_WTERMSIG(sts)
                else:
                    if _WIFEXITED(sts):
                        self.returncode = _WEXITSTATUS(sts)
                    else:
                        if _WIFSTOPPED(sts):
                            self.returncode = -_WSTOPSIG(sts)
                        else:
                            raise SubprocessError("Unknown child exit status!")

            def _internal_poll(
                self,
                _deadstate=None,
                _waitpid=os.waitpid,
                _WNOHANG=os.WNOHANG,
                _ECHILD=errno.ECHILD,
            ):
                """Check if child process has terminated.  Returns returncode
                attribute.
                
                This method is called by __del__, so it cannot reference anything
                outside of the local scope (nor can any methods it calls).
                
                """
                if self.returncode is None:
                    if not self._waitpid_lock.acquire(False):
                        return
                    try:
                        if self.returncode is not None:
                            return self.returncode
                        pid, sts = _waitpid(self.pid, _WNOHANG)
                        if pid == self.pid:
                            self._handle_exitstatus(sts)
                    except OSError as e:
                        if _deadstate is not None:
                            self.returncode = _deadstate
                        else:
                            if e.errno == _ECHILD:
                                self.returncode = 0
                    finally:
                        self._waitpid_lock.release()

                return self.returncode

            def _try_wait(self, wait_flags):
                """All callers to this function MUST hold self._waitpid_lock."""
                try:
                    pid, sts = os.waitpid(self.pid, wait_flags)
                except ChildProcessError:
                    pid = self.pid
                    sts = 0

                return (pid, sts)

            def wait(self, timeout=None, endtime=None):
                """Wait for child process to terminate.  Returns returncode
                attribute."""
                if self.returncode is not None:
                    return self.returncode
                else:
                    if endtime is not None:
                        warnings.warn(
                            "'endtime' argument is deprecated; use 'timeout'.",
                            DeprecationWarning,
                            stacklevel=2,
                        )
                    if endtime is not None or timeout is not None:
                        if endtime is None:
                            endtime = _time() + timeout
                        else:
                            if timeout is None:
                                timeout = self._remaining_time(endtime)
                        if endtime is not None:
                            delay = 0.0005
                            while True:
                                if self._waitpid_lock.acquire(False):
                                    try:
                                        if self.returncode is not None:
                                            break
                                        pid, sts = self._try_wait(os.WNOHANG)
                                        if not pid == self.pid:
                                            if not pid == 0:
                                                raise AssertionError
                                        if pid == self.pid:
                                            self._handle_exitstatus(sts)
                                            break
                                    finally:
                                        self._waitpid_lock.release()

                                remaining = self._remaining_time(endtime)
                                if remaining <= 0:
                                    raise TimeoutExpired(self.args, timeout)
                                delay = min(delay * 2, remaining, 0.05)
                                time.sleep(delay)

                        else:
                            while self.returncode is None:
                                with self._waitpid_lock:
                                    if self.returncode is not None:
                                        break
                                    pid, sts = self._try_wait(0)
                                    if pid == self.pid:
                                        self._handle_exitstatus(sts)

                    return self.returncode

            def _communicate(self, input, endtime, orig_timeout):
                if self.stdin and not self._communication_started:
                    try:
                        self.stdin.flush()
                    except BrokenPipeError:
                        pass

                    if not input:
                        try:
                            self.stdin.close()
                        except BrokenPipeError:
                            pass

                        stdout = None
                        stderr = None
                        if not self._communication_started:
                            self._fileobj2output = {}
                            if self.stdout:
                                self._fileobj2output[self.stdout] = []
                            if self.stderr:
                                self._fileobj2output[self.stderr] = []
                        if self.stdout:
                            stdout = self._fileobj2output[self.stdout]
                        if self.stderr:
                            stderr = self._fileobj2output[self.stderr]
                        self._save_input(input)
                        if self._input:
                            input_view = memoryview(self._input)
                        with _PopenSelector() as (selector):
                            if self.stdin:
                                if input:
                                    selector.register(self.stdin, selectors.EVENT_WRITE)
                            if self.stdout:
                                selector.register(self.stdout, selectors.EVENT_READ)
                            if self.stderr:
                                selector.register(self.stderr, selectors.EVENT_READ)
                            while selector.get_map():
                                timeout = self._remaining_time(endtime)
                                if timeout is not None:
                                    if timeout < 0:
                                        raise TimeoutExpired(self.args, orig_timeout)
                                ready = selector.select(timeout)
                                self._check_timeout(endtime, orig_timeout)
                                for key, events in ready:
                                    if key.fileobj is self.stdin:
                                        chunk = input_view[
                                            self._input_offset : self._input_offset
                                            + _PIPE_BUF
                                        ]
                                        try:
                                            self._input_offset += os.write(
                                                key.fd, chunk
                                            )
                                        except BrokenPipeError:
                                            selector.unregister(key.fileobj)
                                            key.fileobj.close()
                                        else:
                                            if self._input_offset >= len(self._input):
                                                selector.unregister(key.fileobj)
                                                key.fileobj.close()

                                    else:
                                        if key.fileobj in (self.stdout, self.stderr):
                                            data = os.read(key.fd, 32768)
                                            if not data:
                                                selector.unregister(key.fileobj)
                                                key.fileobj.close()
                                            self._fileobj2output[key.fileobj].append(
                                                data
                                            )

                        self.wait(timeout=self._remaining_time(endtime))
                        if stdout is not None:
                            stdout = (b"").join(stdout)
                        if stderr is not None:
                            stderr = (b"").join(stderr)
                        if self.encoding or self.errors or self.universal_newlines:
                            if stdout is not None:
                                stdout = self._translate_newlines(
                                    stdout, self.stdout.encoding, self.stdout.errors
                                )
                            if stderr is not None:
                                stderr = self._translate_newlines(
                                    stderr, self.stderr.encoding, self.stderr.errors
                                )
                        return (stdout, stderr)

            def _save_input(self, input):
                if self.stdin:
                    if self._input is None:
                        self._input_offset = 0
                        self._input = input
                        if input is not None:
                            if self.encoding or self.errors or self.universal_newlines:
                                self._input = self._input.encode(
                                    self.stdin.encoding, self.stdin.errors
                                )

            def send_signal(self, sig):
                """Send a signal to the process."""
                if self.returncode is None:
                    os.kill(self.pid, sig)

            def terminate(self):
                """Terminate the process with SIGTERM
                """
                self.send_signal(signal.SIGTERM)

            def kill(self):
                """Kill the process with SIGKILL
                """
                self.send_signal(signal.SIGKILL)
